<?php
/**
 * This file houses the Renderer class.
 *
 * Copyright (c) 2010, Kalkomey Enterprises, Inc.
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 * 
 * - Redistributions of source code must retain the above copyright notice, this list
 *   of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright notice, this 
 *   list of conditions and the following disclaimer in the documentation and/or other
 *   materials provided with the distribution.
 * - Neither the name of the Kalkomey Enterprises, Inc. nor the names of its 
 *   contributors may be used to endorse or promote products derived from this 
 *   software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
 * SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 * 
 * @license http://www.opensource.org/licenses/bsd-license.php New BSD License
 * @copyright Copyright (c) 2010, Kalkomey Enterprises, Inc.
 * @link http://code.google.com/p/swerv
 * @package Framework
 * @subpackage Library
 */
 
/**
 * The Renderer class is used to determine and then call the correct controller->action based on the URL or a pre-defined set of routes.
 *
 * @package Framework
 * @subpackage Library
 */
class Renderer
{
	
	/**
	 * Determines and then calls the correct controller->action based on the URL or a pre-defined set of routes.
	 *
	 * @throws Exception if the action is not defined in the controller.
	 *
	 * @uses StringUtility::toPascalCase()
	 * @uses StringUtility::toCamelCase()
	 * @uses Router::getInstance()
	 * @uses Router::getRoute()
	 * @uses SiteContext::$controller
	 * @uses SiteContext::$action
	 * 
	 * @return void
	 */
	public static function draw()
	{
		$router = Router::getInstance();
		$route = $router->getRoute();
		$controllerName = StringUtility::toPascalCase($route['controller'] . '_controller');
		if (empty($route['action'])) {
			$action = 'index';
		} else {
			$action = StringUtility::toCamelCase($route['action']);
		}
		SiteContext::$controller = $controllerName;
		SiteContext::$action = $action;
		SiteContext::$protocol = $route['protocol'];
		SiteContext::$params = $route['params'];
		$protocol = new Protocol();
		$controller = new $controllerName($protocol, $route['params']);
		if (!method_exists($controller, $action)) {
			throw new Exception('Action "' . $action . '" is not defined in controller "' . $controllerName . '"');
		}
		if (SiteContext::$protocol != 'doc') {
			$responseObj = $controller->$action($protocol->getRequestObject());
			$output = $protocol->getFormattedResponse($responseObj);
		} else {
			$obj = $controller->$action();
			$output = $protocol->getFormattedResponse($obj);
		}
		
		echo $output;
	}
	
}
